Troubleshooting - Aqua-Hot AHE-100-02S -12 VDC Owner's Manual

SECTION 5: TROUBLESHOOTING
Prior to troubleshooting your Aqua-Hot, be sure to reference Figure 1 for a complete overview of the
heating system, and Figure 2 for a complete component overview of the Diesel-Burner. Also, please
review Section 2.5 of this manual for details on the Diesel-Burner's operation. Use the following
chart when troubleshooting your Diesel-Burner only.
Failure Symptom
No Indicator Light on the
Diesel-Burner Control Switch or
Indicator Light goes Off after 30
sec.
Diesel-Burner Control Switch is
On, but the Diesel-Burner's
Motor does not function, see
Figure 2.
Diesel-Burner does not respond
with the 10-25 sec. Purge-cycle
Diesel-Burner's Combustion
Process does not take place.
Diesel-Burner's Combustion
Process stops after 30 sec.
Use the following chart when troubleshooting your 120 VAC Electric Heating Element only.
120 VAC Electric Heating
Element does not produce heat,
or hot water, when motorhome
is plugged into shore power.
SECTION 5: TROUBLESHOOTING
Aqua-Hot
Quick
Reference
Chart
COMPONENTS
Diesel Control Switch "On"
Diesel Control Switch Indicator Light
Engine Preheat Control Switch
Diesel-Burner
Diesel-Burner
Diesel-Burner
Diesel-Burner
Diesel-Burner
120 VAC Heating Element
Engine Preheat
Page 5-2
Probable Cause
Less than 10 Volts DC to the Aqua-Hot.
No Fuel to the Diesel-Burner.
Defective Fuel Nozzle.
Defective Indicator Light Bulb.
Loose Harness Plug Connections at the Control Unit.
Open "E" or "F" Fuse at the Aqua-Hot.
Less than 10 Volts DC to the Aqua-Hot.
Defective Diesel-Burner Control Switch or Loose Conn.
Less than 10 Volts DC to the Aqua-Hot.
Loose Harness Plug Connections at the Control Unit.
Open "E" or "F" Fuse at the Aqua-Hot.
No Fuel to the Diesel-Burner.
Defective Fuel Nozzle.
Loose Harness Plug Connections at the Control Unit.
Less than 10 Volts DC to the Aqua-Hot.
VAC Breaker is Off or Switch is Defective.
Aqua-Hot™ Motor Coach Heating System Owner's Manual 05/02
FAILURE SYMPTOM
No Function
No indicator light or "Off" after 30 sec.
No indicator light
Motor is not operating
No 10-25 second prime cycle
Ignition Coil will not spark
No Combustion
Combustion stops after 30 seconds
No heat / hot water when plugged into shore power
Diesel Engine Remains cold
Aqua-Hot™ Motor Coach Heating System Owner's Manual 05/02
Remedy
Check House Batteries and Charging System.
Check Fuel Filter and Fuel System.
Replace Fuel Nozzle.
Replace Indicator Light Bulb.
Check Harness Plug Connections to be secure and in
place on the underside of the Control Unit.
Replace "E" or "F" Fuse.
Check House Batteries and Charging System.
Replace Switch or Repair Loose Connection.
Check House Batteries and Charging System.
Check Harness Plug Connections to be secure and in
place on the underside of the Control Unit.
Replace "E" or "F" Fuse.
Check Fuel Filter and Fuel System.
Replace Fuel Nozzle.
Check Harness Plug Connections to be secure and in
place on the underside of the Control Unit.
Check House Batteries and Charging System.
Turn VAC Breaker On or replace Switch.
CHECK OR REPLACE IF NECESSARY
Page 5-1